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JAMB Physics 2024 Paper

Question : 125

Total: 125

Solution:

Concept:

An echo is sound reflected back to the listener, so sound travels twice the distance between the boy and the wall.

Explanation:

Distance between boy and wall is

408 \, \text{m}

Total distance travelled by the sound before the echo is heard:

d = 2 \times 408 = 816 \, \text{m}

Given time for echo,

t = 2.4 \, \text{s}

Speed of sound,

v = \frac{d}{t} = \frac{816}{2.4} = 340 \, \text{m/s}

Answer:

340 \, \text{m/s}

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